Anti-Granzyme B, clone GrB-7 (Monoclonal) [Mouse]

MON 7029C reacts with the 33 kD human serine protease granzyme B. It does not react with human granzyme A. It is used as a marker for NK-cells and activated cytotoxic T-cells (CTL). This protease is localized in cytoplasmic granules and gives a granular staining pattern. Granzyme B is involved in target cell apoptosis during lymphocyte mediated cyto toxicity . Exocytosis of granzyme containing granules in the cytoplasm of the target cell will lead to induction of DNA fragmentation and apoptosis of the target cell. The monoclonal antibody stains granzyme B expressing lymphocytes in sections of sublima te formaldehyde as well as formalin fixed paraffin embedded tissues. It does not react with other cell types. Protein function: Abundant protease in the cytosolic granules of cytotoxic T- cells and NK-cells which activates caspase-independent pyroptosis when delivered into the target cell through the immunological synapse (PubMed:3262682, PubMed:3263427, PubMed:1985927). It cleaves after Asp (PubMed:8258716, PubMed:1985927). Once delivered into the target cell, acts by catalyzing cleavage of gasdermin-E (GSDME), releasing the pore- forming moiety of GSDME, thereby triggering pyroptosis and target cell death (PubMed:32188940, PubMed:31953257). Seems to be linked to an activation cascade of caspases (aspartate-specific cysteine proteases) responsible for apoptosis execution. Cleaves caspase-3, -7, -9 and 10 to give rise to active enzymes mediating apoptosis (PubMed:9852092). [The UniProt Consortium]